Improvement in sand-pumps



E. F. ANDREWS..

SAND-PUMP.

116.174,18@ Patented Feb-29,1875

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'PATENT EijwARD RANDRRws, or AUGUSTA, GEORGIA.

IMISR'VE'MENT |N` SAN D-P' Mrs.

Specification forming part of Letters Patent No. 174,!80, dated February29,1876; application filed To all fiuhom it may concern:

Beit known that I, EDWARD FRANK AN- DREWS, of Augusta, in' the county ofRich- .mond and State of Georgia, have invented a come partially filledwith sand, mud, or other foreign substances or impurities. f

The object of my invention is to provide an improved. pump' for removalof the same,

without at the same time removing the water from the well. To this end Iadopt the construction'and arrangement'of parts hereinafter describedand claimed.

In the accompanying drawing, Figure 1 is a sectional elevation of myimproved pump; Fig. 2, a plan view of the bottom thereof. Fig. 3 is asectional elevation of a sand-chamber of modified construction.

rPhe barrelof the pump is formed of two parts-the piston-chamber A, andsand and mud chamber B-which are connected by flanges a and screws b. Acloth or wire-gauze strainer, C, is clamped and conlined between theparts A B, the same forming the top of the latter B, as shown. Thecentrally-apertured piston D is provided with 'a ball-valve,

E, which is inclosed by a wire guard, F, but

has entire freedom of 4movement within the same, so as to alternatelyopen and close the opening in the piston, as the piston reciprocates.The plunger or piston-rod is provided with a ring, c, for attachment ofa chain or- February 2, 1876.

ber, are arranged within the sand and mud chamber B, -the same being setvertical in the circular rim or baseof the chamber, and. being in lengthabout two-thirds the height of the chamber. rIhe bottom of the chamberis closed by a hinged bottom, I, secured by slidebolts h.

It is evident that when the pump is lowered' into a well containingsand, mud, and other solid foreign matter of such a nature as enables itto pass up the tubes lH, and the piston is then raised, the vacuum thuscreated will cause the sand or mud, Src., to be vtaken up and enter thetubes H along with the water. The sand or mud will be arrested by thestrainer, and thus be deposited in the chamber B, while the water willraisethe ballvalve, and pass through the piston upon its descent.

This operation may be continued until the chamber B has become lled withsand or hinged bottom. The sand or other sediment' received into thechamber is also more readily discharged from the chamber than would bethe case if a single large tube were arranged in the center of thechamber.

The water which passes through the strainer is forced out of the top ofchamber A, and thus returned to the well.

- The modified form of the bottom of the sand-chamber, Fig. 3, isconcave, so that the same will tend somewhat to exclude the water andconcentrate the body of sand which it is desired to draw into the pump,thus materially facilitating the action of the pump.

It is of course necessary that the piston-rod or piston shall beconstructed of material having sufficient weight to force the pistondown when tension is removed from the hoisting-cord. Y

The piston-valve should also be of stone,

metal, or other material .of greater specific 2. In a sand-pump, thechamber B, having gravity than Water. the concentric circle of tubes,and the hinged I do not claim, broadly, the employment of bottom closingthe lopening between the tubes for delivering sand or other sedimentmouths of the tubes, as shown and described. into a pump-chamber; but AWhat I claim s- EDWARD FRANK ANDREWS. 1. In a sand-pump, the chamber B,having the tubes arranged in a concentric circle, the Witnesses: pistonD, and intervening strainer C, as shown CORTEZ CLARK, and described. YFRED. T. LocKHAR'r.

